download ROM Manager from the Market. open the application and go to “Download ROM”. select a rom, download and install. MAKE SURE TO BACKUP YOUR DEVICE BEFORE YOU INSTALL. Most roms will recommend wiping cache and data for a clean install.

A lof of us are running Rubix Focused .5 or 1.0 from Drod, there’s a lot of threads about this.

Having Bootstrap Recovery is a good idea. Gotta have your original setup backed up for future use or if things go bad. ROM Manager worked great for me a couple times. But I also tried things on my own as mwhartman explained. Nice to know how things work.

Read instructions for each ROM, for they are not always the same. And always make a backup of current before diving in.